Search found 136 matches

by Sana Nagori 2H
Sun Feb 28, 2021 9:08 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Sapling Week 7/8 question 15
Replies: 6
Views: 22

Re: Sapling Week 7/8 question 15

I think you use Nernst equation. So you need to find the Enaught and then plug everything in to the equation. For Q you would do .761 on top and then .01 in the denominator.
by Sana Nagori 2H
Sun Feb 28, 2021 8:31 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Sapling week 7/8 number 15
Replies: 3
Views: 35

Re: Sapling week 7/8 number 15

You use the Nernst Equation so you are given products and reactants molarity for Q. T= 298 and R=8.314. n is the mol of electrons transferred and then F is a constant. Pretty much all you need to calculate is E naught from the table and plug everything into the equation. To calculate E naught do the...
by Sana Nagori 2H
Sun Feb 28, 2021 7:43 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Sapling Week 7/8 #7
Replies: 10
Views: 43

Re: Sapling Week 7/8 #7

does the order of the shorthand notation matter?
by Sana Nagori 2H
Sun Feb 28, 2021 6:09 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Sapling #12
Replies: 3
Views: 13

Re: Sapling #12

you might be forgetting to convert to kJ. That's what was happening to me and it took so many tries for me to figure that out.
by Sana Nagori 2H
Sun Feb 28, 2021 5:31 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Sapling #12
Replies: 4
Views: 25

Re: Sapling #12

I was stuck on this one too so thanks!
by Sana Nagori 2H
Sun Feb 28, 2021 11:11 am
Forum: Calculating Work of Expansion
Topic: Finding Reversibility
Replies: 8
Views: 24

Re: Finding Reversibility

doesn't isothermal mean irreversible or is that not always the case?
by Sana Nagori 2H
Sun Feb 21, 2021 3:33 pm
Forum: Student Social/Study Group
Topic: points needed for c instead of c minus
Replies: 6
Views: 45

Re: points needed for c instead of c minus

I think you can just divide the number of points earned by the total points possible to find out right? Since it is a straight scale
by Sana Nagori 2H
Sun Feb 21, 2021 3:31 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calibrating Calorimeter
Replies: 6
Views: 12

Re: Calibrating Calorimeter

I think it is to find the heat capacity of the calorimeter so that you can use it to find the heat released in another reaction
by Sana Nagori 2H
Sun Feb 21, 2021 3:23 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Average Kinetic Energy
Replies: 4
Views: 37

Re: Average Kinetic Energy

I didn't understand this problem either so I just skipped it
by Sana Nagori 2H
Sun Feb 21, 2021 3:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Tips for Concentrating during a test
Replies: 31
Views: 102

Re: Tips for Concentrating during a test

Try studying in a similar environment as your exams and build up your concentration by using timers
by Sana Nagori 2H
Sun Feb 21, 2021 3:07 pm
Forum: Student Social/Study Group
Topic: Post Midterm 2 De-stressing
Replies: 92
Views: 252

Re: Post Midterm 2 De-stressing

I have to cram for my 7B midterm on Monday but I have been binging episodes of Lucifer in between study sessions
by Sana Nagori 2H
Sun Feb 14, 2021 7:11 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Units
Replies: 20
Views: 47

Re: Units

Yeah it's a bit confusing with all the different units going on. I just write out all the units when doing calculations so I can check if they are crossing out.
by Sana Nagori 2H
Sun Feb 14, 2021 3:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Material
Replies: 10
Views: 40

Re: Midterm Material

Jalyn Davis 3D wrote:
Sana Nagori 2H wrote:Was friday's lecture part of outline 4 stuff?

Based on Lavelle's email from yesterday, it seems like Friday's lecture was the end of outline 4, so it is the last lecture that includes midterm content.


ah ok thank you! Guess I actually have to watch it now ://
by Sana Nagori 2H
Sun Feb 14, 2021 3:07 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy Equations
Replies: 3
Views: 15

Re: Entropy Equations

Same, it seems like there are so many equations to keep track of
by Sana Nagori 2H
Sun Feb 14, 2021 3:06 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Temperature and K
Replies: 14
Views: 34

Re: Temperature and K

K as in Kelvin?
by Sana Nagori 2H
Sun Feb 14, 2021 3:05 pm
Forum: Student Social/Study Group
Topic: Fav Shows of the Moment
Replies: 104
Views: 250

Re: Fav Shows of the Moment

I'm currently watching Lucifer and started Supernatural! I'm also looking forward to watching World War 2 in Color once midterms end!
by Sana Nagori 2H
Sun Feb 14, 2021 3:00 pm
Forum: Student Social/Study Group
Topic: Fav Shows of the Moment
Replies: 104
Views: 250

Re: Fav Shows of the Moment

Namratha Gujje wrote:I have been watching Teen Wolf which honestly is a really good show. I wasn't expecting it to be this good when I first started it. 10/10 would recommend.

I was obsessed with teen wolf in middle school. I miss those days
by Sana Nagori 2H
Sun Feb 14, 2021 2:58 pm
Forum: Student Social/Study Group
Topic: Classes for next quarter?
Replies: 136
Views: 447

Re: Classes for next quarter?

Ls7c, maybe chem 14c and maybe ls23l. I don't feel like taking any classes tbh
by Sana Nagori 2H
Sun Feb 14, 2021 2:57 pm
Forum: Student Social/Study Group
Topic: Balance / Self Care Tips
Replies: 43
Views: 140

Re: Balance / Self Care Tips

Personally doing an absolutely poor job of it. It was much easier to do with in-person classes because there was a clear distinction between classes and your free time. I just try to do my relaxing during the day when I'm most unproductive anyway and then study at night when I feel more awake.
by Sana Nagori 2H
Sun Feb 14, 2021 2:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Material
Replies: 10
Views: 40

Re: Midterm Material

Was friday's lecture part of outline 4 stuff?
by Sana Nagori 2H
Sun Feb 14, 2021 2:54 pm
Forum: Administrative Questions and Class Announcements
Topic: struggling
Replies: 73
Views: 267

Re: struggling

Maybe you need to spend some time focusing on the concepts and understanding what is truly happening. I think it makes approaching problems much easier and is especially helpful if you're stuck on a problem.
by Sana Nagori 2H
Sun Feb 07, 2021 8:18 pm
Forum: Student Social/Study Group
Topic: Midterm 2 study tips
Replies: 26
Views: 75

Re: Midterm 2 study tips

Janna Shakiba wrote:
When you say outline questions, are you referring to the problems listed in the syllabus?


Yes! They are on the syllabus and also at the top of the outlines that the professor has on his website. It's just the relevant questions in the textbook.
by Sana Nagori 2H
Sun Feb 07, 2021 8:16 pm
Forum: Student Social/Study Group
Topic: Studying When You Don't Want to
Replies: 48
Views: 151

Re: Studying When You Don't Want to

This may seem counterintuitive, but sometimes just taking a day off is the best thing you can do for yourself. There are days where I know even if I force myself to study, I won't actually retain anything. I take those days to recharge, do something to de-stress and hopefully bounce back the next da...
by Sana Nagori 2H
Sun Feb 07, 2021 7:51 pm
Forum: Student Social/Study Group
Topic: Midterm 2 study tips
Replies: 26
Views: 75

Re: Midterm 2 study tips

As most people will say, the textbook and the outline questions are your best friend. I haven't had time to go to any UA sessions this quarter, which are good extra practice, but even doing the textbook problems made me feel better about the material!
by Sana Nagori 2H
Sun Feb 07, 2021 7:49 pm
Forum: Student Social/Study Group
Topic: Book Recommendations
Replies: 100
Views: 258

Re: Book Recommendations

A Thousand Splendid Suns is one of my favorites but maybe not the happiest read. Station Eleven is also a cool book, especially since it's set in a post-pandemic world.
by Sana Nagori 2H
Sun Feb 07, 2021 7:44 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Sapling Week 3/4 #13
Replies: 8
Views: 41

Re: Sapling Week 3/4 #13

One mistake I was making was that I didn't realize there were solids as the reactants. There will be work done if the products have more moles of gas and since the reaction goes from 0 to 1 mole of gas then it is doing work.
by Sana Nagori 2H
Sun Feb 07, 2021 7:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2
Replies: 31
Views: 144

Re: Midterm 2

I'm still mentally on midterm 1
by Sana Nagori 2H
Sun Jan 31, 2021 10:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Reflecting on the midterm
Replies: 17
Views: 103

Re: Reflecting on the midterm

This was my exact same problem. Last quarter I finished the exams at least 10 minutes early but I guess the content this quarter is a little more calculation heavy. I guess we just need to get more practice!
by Sana Nagori 2H
Sun Jan 31, 2021 6:55 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Adding a gas
Replies: 22
Views: 76

Re: Adding a gas

It's an inert gas so it won't be taken into account for Le Chateliers principle
by Sana Nagori 2H
Sun Jan 31, 2021 6:53 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: R Constant
Replies: 89
Views: 247

Re: R Constant

writing out your units is always helpful in calculations so you can keep track of what cancels out and whether you end up with the correct units needed for you answer.
by Sana Nagori 2H
Sun Jan 31, 2021 6:52 pm
Forum: Student Social/Study Group
Topic: Spring 2021
Replies: 104
Views: 440

Re: Spring 2021

I'm probably taking it in fall or even later
by Sana Nagori 2H
Sun Jan 31, 2021 6:50 pm
Forum: Student Social/Study Group
Topic: Midterm Scores
Replies: 25
Views: 138

Re: Midterm Scores

It takes about a week to two to get them out usually.
by Sana Nagori 2H
Sun Jan 24, 2021 5:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: [B]formal
Replies: 5
Views: 42

Re: [B]formal

I was confused by this too! I just used the Kb equation and ended up solving for [B]
by Sana Nagori 2H
Sun Jan 24, 2021 5:19 pm
Forum: Student Social/Study Group
Topic: CHEM 14B Midterm 1 Notes
Replies: 23
Views: 143

Re: CHEM 14B Midterm 1 Notes

That's so nice thanks!
by Sana Nagori 2H
Sun Jan 24, 2021 5:18 pm
Forum: Administrative Questions and Class Announcements
Topic: midterm
Replies: 11
Views: 61

Re: midterm

Janna Shakiba wrote:So we will need 2 devices to take the midterm like last quarter?


yes pretty much. Most people take the exam on their laptop and then use their phones for the zoom
by Sana Nagori 2H
Sun Jan 24, 2021 5:16 pm
Forum: Administrative Questions and Class Announcements
Topic: Textbook Problems Not Listed in Syllabus
Replies: 3
Views: 27

Re: Textbook Problems Not Listed in Syllabus

No I don't look at the unassigned ones. The ones on the outline seemed to be good enough for 14A
by Sana Nagori 2H
Sun Jan 24, 2021 5:15 pm
Forum: General Science Questions
Topic: Studying
Replies: 42
Views: 452

Re: Studying

As most people said, I found doing the textbook/outline questions at least twice helped me the most and then looking up random practice problems online for extra practice
by Sana Nagori 2H
Sun Jan 17, 2021 8:42 pm
Forum: Student Social/Study Group
Topic: Exercising Our Minds and Bodies
Replies: 120
Views: 624

Re: Exercising Our Minds and Bodies

I've been doing such a poor job of exercising my body but these are all great ideas!
by Sana Nagori 2H
Sun Jan 17, 2021 8:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling Homework #5
Replies: 9
Views: 62

Re: Sapling Homework #5

Hi! For this one, I would first figure out which equations that were given will give us the reaction at the top. I would focus on getting all of the species on the correct side of the equation to match the one at the top. For example, I would flip N2 + 3H2 <-> 2NH3 so that the species are on the sa...
by Sana Nagori 2H
Sun Jan 17, 2021 8:22 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Endothermic vs Exothermic
Replies: 7
Views: 42

Re: Endothermic vs Exothermic

I think delta H is what we look at because it tells us whether the heat of the system increased or decreased with the reaction
by Sana Nagori 2H
Sun Jan 17, 2021 7:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling #4
Replies: 6
Views: 46

Re: Sapling #4

For this problem, I set up an ICE box and used it to find x. The initial pressure of PCl5 would be 0.0370 bar and the change would be -x, while the other initial pressures would be 0, and the change would be +x. After using Kp and finding x, you would calculate the pressures at equilibrium and add ...
by Sana Nagori 2H
Sun Jan 17, 2021 7:37 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling Homework #5
Replies: 9
Views: 62

Re: Sapling Homework #5

I'm also kind of stuck on this one. Should we be adding/subtracting these equations and using the inverse K value when possible?
by Sana Nagori 2H
Sun Jan 17, 2021 7:35 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling Week 1 #3
Replies: 9
Views: 53

Re: Sapling Week 1 #3

Kaiya_PT_1H wrote:Not sure if this helps, but I spent a long time on this trying to do the quadratic formula when you can just square root the Kc formula and the value for Kc to solve for x.

I wish I saw this beforehand. I also did the whole quadratic formula out haha
by Sana Nagori 2H
Sun Jan 17, 2021 7:32 pm
Forum: Student Social/Study Group
Topic: Study Strategies
Replies: 31
Views: 61

Re: Study Strategies

I find textbook problems and youtube videos help me the most
by Sana Nagori 2H
Sun Jan 10, 2021 9:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 1 Assignment
Replies: 17
Views: 90

Re: Week 1 Assignment

Sapling is our graded homework but it's only graded on completion! The textbook problems given in the outlines are the ones for extra practice and are optional
by Sana Nagori 2H
Sun Jan 10, 2021 9:26 pm
Forum: Ideal Gases
Topic: n/V = concentration
Replies: 19
Views: 128

Re: n/V = concentration

It's just rearranging the equation and realizing that molarity=concentration= mol/L
by Sana Nagori 2H
Sun Jan 10, 2021 9:24 pm
Forum: Ideal Gases
Topic: Reviewing PV=NRT
Replies: 7
Views: 76

Re: Reviewing PV=NRT

605291562 wrote:On sapling you can find a pdf version you can download which is probably easiest, they also have all the odd answers in the back of the book.

Definitely suggest downloading the pdf if you plan on doing a lot of practice problems.
by Sana Nagori 2H
Sun Jan 10, 2021 9:22 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Substances for Calculating K
Replies: 4
Views: 11

Re: Substances for Calculating K

Also he showed that in aqueous solutions even if you included H20 in both the reactants and products it would cancel out.
by Sana Nagori 2H
Sun Jan 10, 2021 2:15 am
Forum: Student Social/Study Group
Topic: Study Habits
Replies: 96
Views: 331

Re: Study Habits

Practice problems are the best preparation! Also on days you're lacking motivation I highly suggest going to UA sessions. You end up getting some extra practice and it isn't as painful as forcing yourself to stare at textbook problems for hours.
by Sana Nagori 2H
Sun Jan 10, 2021 2:11 am
Forum: Administrative Questions and Class Announcements
Topic: Chemical Principles through Bookshelf
Replies: 3
Views: 18

Re: Chemical Principles through Bookshelf

There is also a free online pdf that you can download. I find it easier to navigate.
by Sana Nagori 2H
Tue Dec 15, 2020 3:57 pm
Forum: Amphoteric Compounds
Topic: Is Silicon an amphoteric element?
Replies: 2
Views: 32

Re: Is Silicon an amphoteric element?

I don't think it is!
by Sana Nagori 2H
Tue Dec 15, 2020 3:55 pm
Forum: Lewis Acids & Bases
Topic: Classifying Other
Replies: 4
Views: 20

Re: Classifying Other

I think like NaCl would be other since it is not an acid or base
by Sana Nagori 2H
Tue Dec 15, 2020 3:52 pm
Forum: Lewis Acids & Bases
Topic: Strong Lewis Bases?
Replies: 3
Views: 26

Re: Strong Lewis Bases?

Oxides and Hydroxides of group 1 and 2 elements!
by Sana Nagori 2H
Tue Dec 15, 2020 3:51 pm
Forum: Amphoteric Compounds
Topic: Glycine Amphoteric
Replies: 3
Views: 29

Re: Glycine Amphoteric

Racquel Fox 3L wrote:
Why would N want a +1 charge thought?


It's not that N would WANT a +1 charge but more that oxygen really doesn't want one.
by Sana Nagori 2H
Tue Dec 15, 2020 3:50 pm
Forum: Student Social/Study Group
Topic: How are you?
Replies: 117
Views: 881

Re: How are you?

Just finished my last exam so that's a big relief! Now I only have an essay left.
by Sana Nagori 2H
Sat Dec 12, 2020 8:13 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Stronger acids and stability?
Replies: 5
Views: 66

Re: Stronger acids and stability?

stronger acids are more stable after they have lost their H+. If a molecule loses a proton and is stable it is less likely to want to pick one up again and therefore will stay completely deprotenated so that's why a stronger acid will have a more stable conjugate base!
by Sana Nagori 2H
Sat Dec 12, 2020 8:10 pm
Forum: Student Social/Study Group
Topic: Study music
Replies: 32
Views: 236

Re: Study music

this might just be me but I actually like listening to songs with words in them. Usually I turn them up loud enough where it just becomes background noise and I don't get distracted but it sounds counterintuitive.
by Sana Nagori 2H
Sat Dec 12, 2020 8:09 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: 6C. 17
Replies: 3
Views: 25

Re: 6C. 17

I think it's because bases with Nitrogen are weak bases generally. Also the minus charge on BrO- would really want to form a bond with a hydrogen because it's an ion and wants to get rid of that charge and that is why it's the stronger base
by Sana Nagori 2H
Sat Dec 12, 2020 8:07 pm
Forum: Bond Lengths & Energies
Topic: hydrogen bonding vs ion-dipole
Replies: 5
Views: 56

Re: hydrogen bonding vs ion-dipole

I think ion-dipole is stronger than H-bonds
by Sana Nagori 2H
Sat Dec 12, 2020 8:05 pm
Forum: Identifying Acidic & Basic Salts
Topic: 12.65 (e) and (f)
Replies: 5
Views: 1241

Re: 12.65 (e) and (f)

I don't know about the hydrates part but for determining the pH, the positive charge on the TM cations would want to bond with the partially negative oxygen atom of water thus weakening a O-H bond and releasing a H+ so that is why the pH<7
by Sana Nagori 2H
Sat Dec 12, 2020 3:04 pm
Forum: Amphoteric Compounds
Topic: Glycine Amphoteric
Replies: 3
Views: 29

Re: Glycine Amphoteric

I think because if oxygen donated a pair it would end up with a positive formal charge and oxygens do not want that.
by Sana Nagori 2H
Sat Dec 12, 2020 3:02 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Sapling HW 10 Question#5
Replies: 3
Views: 32

Re: Sapling HW 10 Question#5

do we have to know Kw?
by Sana Nagori 2H
Sat Dec 12, 2020 3:01 pm
Forum: Lewis Acids & Bases
Topic: Textbook Question 6.5
Replies: 2
Views: 19

Re: Textbook Question 6.5

I kinda just thought about it where usually nonmetal oxides are acids and that's why SO3 is the acid but I'm not sure if that's correct
by Sana Nagori 2H
Thu Dec 10, 2020 8:32 am
Forum: Administrative Questions and Class Announcements
Topic: Matthew's Workshop - Week 10
Replies: 2
Views: 805

Re: Matthew's Workshop - Week 10

Thank you! The workshop was really helpful!
by Sana Nagori 2H
Sun Dec 06, 2020 6:54 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Sigma and Pi bond rotation
Replies: 4
Views: 48

Re: Sigma and Pi bond rotation

single bonds are always sigma bonds so they can rotate. However, a double bond has an addition pi bond which limits the rotation and essentially locks the sigma bond in place because they are at 90 degrees to each other (I think). This is why a double and triple bond would not be able to rotate.
by Sana Nagori 2H
Sun Dec 06, 2020 6:53 pm
Forum: Naming
Topic: Potassium
Replies: 8
Views: 94

Re: Potassium

when naming, the cations outside the bracket like Na or K wouldn't have prefixes and the same with anions like Cl on the outside of brackets. They would just be potassium or chloride.
by Sana Nagori 2H
Sun Dec 06, 2020 6:49 pm
Forum: Naming
Topic: Ferrate
Replies: 5
Views: 42

Re: Ferrate

yes! Copper, silver, and gold off the top of my head also have exceptions
by Sana Nagori 2H
Sun Dec 06, 2020 6:41 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate Ligands We Have to Know
Replies: 3
Views: 36

Re: Polydentate Ligands We Have to Know

There is a list on the professors website that has the names of the ligands. However, it doesn't specify the number of bonding sites for each. From what I've heard, the main polydentate ions to know are oxalato (2), carbonato (1 or 2), en (2), dien (3), and edta (6). Someone else can let me know if ...
by Sana Nagori 2H
Sun Dec 06, 2020 6:39 pm
Forum: Naming
Topic: -ate
Replies: 17
Views: 116

Re: -ate

yes you have to check if the TM compound has an overall negative charge. It's easy in these questions because it is just the anion but sometimes when there is a cation (like Na or K) present the negative charge isn't written and you have to look at the two components separately to realize the TM com...
by Sana Nagori 2H
Sun Dec 06, 2020 6:38 pm
Forum: Naming
Topic: Naming [Co(CN)5(OH2)]2-
Replies: 5
Views: 42

Re: Naming [Co(CN)5(OH2)]2-

some ligands have special names when naming coordination compounds. Water is aqua, not hydro. Aqua comes first alphabetically which is why aqua comes first and then pentacyano. Also, since the compound has an overall negative charge, the TM is named with a "ate" ending- cobaltate- to signi...
by Sana Nagori 2H
Fri Nov 27, 2020 9:29 pm
Forum: Lewis Structures
Topic: Ring structures
Replies: 4
Views: 61

Re: Ring structures

CesarLec1 wrote:I believe that for our purposes, when we see a molecule with 6 carbon atoms, it will most likely be in a ring structure

Yeah usually when there aren't enough Hydrogens to fill out a zigzag structure I try to fit it into a ring structure.
by Sana Nagori 2H
Fri Nov 27, 2020 9:27 pm
Forum: Sigma & Pi Bonds
Topic: Question on Sigma Bonds and Polarity
Replies: 5
Views: 49

Re: Question on Sigma Bonds and Polarity

Maybe someone out there has a more definite answer
by Sana Nagori 2H
Fri Nov 27, 2020 9:27 pm
Forum: Sigma & Pi Bonds
Topic: Question on Sigma Bonds and Polarity
Replies: 5
Views: 49

Re: Question on Sigma Bonds and Polarity

This is actually an interesting thought. Maybe they can briefly cancel but overall it will remain what it dominantly is.
by Sana Nagori 2H
Fri Nov 27, 2020 9:13 pm
Forum: Sigma & Pi Bonds
Topic: Delocalized Pi Bond
Replies: 5
Views: 59

Re: Delocalized Pi Bond

When a molecule has resonance where a double/triple bond can be found in multiple locations, the electrons in those bonds are delocalized. If a molecule has resonance, the pi bonds making up those double/triple bonds are delocalized.
by Sana Nagori 2H
Fri Nov 27, 2020 9:09 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelating Ligands
Replies: 4
Views: 59

Re: Chelating Ligands

Marcus Lagman 1B wrote:Hello!

I do think you are correct! Here is an image of where the bonding sites would occur:

Image


this is a really helpful image!
by Sana Nagori 2H
Fri Nov 27, 2020 9:05 pm
Forum: Hybridization
Topic: Bound Atoms
Replies: 5
Views: 33

Re: Bound Atoms

If two atoms are "bound", they have a bond between them. If this bond is a sigma bond (a single bond), then the atom can rotate freely. Once the bonds become double or triple, there are pi bonds that inhibit this freedom and the atoms can no longer rotate from the plane they are in.
by Sana Nagori 2H
Sat Nov 21, 2020 9:55 pm
Forum: Ionic & Covalent Bonds
Topic: Polar/ Nonpolar
Replies: 23
Views: 179

Re: Polar/ Nonpolar

Yes but it still needs to have dipole moments. Molecules with only H-C bonds will never have a significant difference in electronegativity so no matter the shape they will never be polar.
by Sana Nagori 2H
Sat Nov 21, 2020 9:52 pm
Forum: Sigma & Pi Bonds
Topic: 2F 19
Replies: 3
Views: 64

Re: 2F 19

I haven't caught up on all the lectures so I don't know what it means in this context but orthogonal just means perpendicular.
by Sana Nagori 2H
Sat Nov 21, 2020 9:46 pm
Forum: Student Social/Study Group
Topic: Study Tips for Final Exam
Replies: 57
Views: 460

Re: Study Tips for Final Exam

I think I will probably watch some youtube videos on stuff I'm still confused on and just try to do as many practice problems as I can because I learn better by actually doing problems and not just watching lectures.
by Sana Nagori 2H
Sat Nov 21, 2020 9:45 pm
Forum: Ionic & Covalent Bonds
Topic: Radicals
Replies: 10
Views: 99

Re: Radicals

Yeah you're probably right because an odd number electrons means it is a radical
by Sana Nagori 2H
Sat Nov 21, 2020 9:41 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ground State vs. Excited State
Replies: 6
Views: 79

Re: Ground State vs. Excited State

Ground state configuration would be the configuration that you expect to see then following the rules that we learned about in class like Pauli's Exclusion Principle and Hunds rule. In an excited state, you'll see in electron in a higher energy level than expected. For example, Helium's ground state...
by Sana Nagori 2H
Fri Nov 20, 2020 10:19 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: LDF
Replies: 5
Views: 61

Re: LDF

There's a bit in the textbook that talks about this regarding boiling points where it said that LDFs became more important than polarity but honestly it confused me.
by Sana Nagori 2H
Fri Nov 20, 2020 9:44 pm
Forum: Student Social/Study Group
Topic: post midterm 2
Replies: 27
Views: 307

Re: post midterm 2

I just had mine today and I'm just glad it's over tbh. I've been watching Netflix all day since I took it.
by Sana Nagori 2H
Fri Nov 20, 2020 9:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 8 Chem 14A Friday Lecture
Replies: 7
Views: 95

Re: Week 8 Chem 14A Friday Lecture

I don't think we're supposed to have lecture because on CCLE it says that there's no school.
by Sana Nagori 2H
Tue Nov 17, 2020 10:09 am
Forum: Lewis Structures
Topic: Lewis structures for Ionic bonds
Replies: 1
Views: 32

Lewis structures for Ionic bonds

How do we know when to do the lewis structures with the brackets and no lines vs the lewis structures with the lines (for covalent molecules). Would we have to be given the electronegativity and calculate whether the difference is larger than 2 to determine its an ionic bond? Or at least told that i...
by Sana Nagori 2H
Sat Nov 14, 2020 4:04 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Importance of anions and cations
Replies: 15
Views: 116

Re: Importance of anions and cations

Similar to what someone said I remember CATions as being PAWsitive :))
by Sana Nagori 2H
Sat Nov 14, 2020 3:54 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizability
Replies: 9
Views: 55

Re: Polarizability

All these replies are really helpful, thanks guys!
by Sana Nagori 2H
Sat Nov 14, 2020 3:31 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures on Midterm
Replies: 31
Views: 163

Re: Drawing Lewis Structures on Midterm

I also have a question about drawing lewis structures on the midterm. I noticed that sometimes the textbook writes the molecular formula in the order it wants us to draw the lewis structure, even if this order doesn't minimize formal charge. Like ClNO2 would be drawn with Cl attached to N, and then...
by Sana Nagori 2H
Sat Nov 14, 2020 3:23 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures on Midterm
Replies: 31
Views: 163

Re: Drawing Lewis Structures on Midterm

alebenavides wrote:if we're drawing lewis structures on the midterm is it going to be how it is on sapling?


I think the exam is multiple choice like the last one so we probably will only have to choose what is the correct answer.
by Sana Nagori 2H
Sat Nov 14, 2020 3:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Question for Students about High School Chem
Replies: 25
Views: 122

Re: Question for Students about High School Chem

Almost everything we are learning is new to me so yeah it can definitely get overwhelming at times.
by Sana Nagori 2H
Sat Nov 14, 2020 3:16 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 4s
Replies: 4
Views: 18

Re: 4s

I don't think 4s is ever written before 3d because the moment that electrons enter the 3d, 4s actually becomes higher energy so it would come after. However, someone correct me if I'm wrong because this was confusing me too.
by Sana Nagori 2H
Sun Nov 08, 2020 12:33 pm
Forum: Lewis Structures
Topic: BF3 lewis dot structure
Replies: 3
Views: 24

Re: BF3 lewis dot structure

Hello, I think the reason why Lewis structures like BF3 does not have a lone pair because of each atom's formal charge. If there is a single bond between Boron with the three Fluorine atoms, each atom would have a formal charge of 0. While if there is one double bond between the Boron and a Fluorin...
by Sana Nagori 2H
Sun Nov 08, 2020 12:30 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Filling orbitals
Replies: 2
Views: 22

Filling orbitals

When we are drawing out the arrows in orbitals, do we first do them all pointing up or pointing down since it can change what ml is. Or does it not matter because we are not able to identify whether the spin should be up or down?
by Sana Nagori 2H
Fri Nov 06, 2020 1:47 pm
Forum: Electronegativity
Topic: Electronegativity vs Electron Affinity
Replies: 2
Views: 23

Re: Electronegativity vs Electron Affinity

Chem_Mod wrote:Electronegativity is the ability of an atom to attract electrons to itself. Electron affinity is the energy released when an electron is added to an atom.

Thank you! I was quite confused about this too.
by Sana Nagori 2H
Fri Nov 06, 2020 1:46 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 4
Views: 34

Re: Electronegativity

Yeah, I don't think we have to worry about the middle values because we wouldn't be able to tell just looking at it. We would probably be given more information.
by Sana Nagori 2H
Fri Nov 06, 2020 1:44 pm
Forum: Ionic & Covalent Bonds
Topic: More Covalent Character
Replies: 2
Views: 35

Re: More Covalent Character

From what I gather, larger ions cause more covalent character because they hold on to their valence electrons less tightly so those electrons can be distorted more easily and get pulled to the other side. This would make the electron difference more even and covalent bonds have more even sharing of ...
by Sana Nagori 2H
Fri Nov 06, 2020 1:40 pm
Forum: Electronegativity
Topic: Electronegativity trend
Replies: 18
Views: 109

Re: Electronegativity trend

I visualize it as increasing as you go up and to the right of the periodic table. It also follows the trends of ionization energy and electron affinity because the more an atom "likes" electrons and wants to pull them towards it, the more energy that it will take to get rid of it (ionizati...
by Sana Nagori 2H
Fri Nov 06, 2020 1:38 pm
Forum: Lewis Structures
Topic: BF3 lewis dot structure
Replies: 3
Views: 24

BF3 lewis dot structure

For BF3, and other lewis structures in general, how do we know not to put the lone pair on B even though it can take on more electrons? Is it because we calculate how many total valence electrons there are and know that the lone pair isn't necessary?

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